An update has been released.
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Note: This only applies to Windows and Linux/Steam OS users
-Voice desync which occurred when switching languages is now fixed. Further desync when using rollback after switching languages is also fixed.
-There is a high possibility that your previous save files will cause the game to crash. In some cases, selecting 'Rollback' a few times may break out of the crash and allows you to re-save. For users that don't want to use the new update, the previous build can be accessed by right-clicking 'Fatal Twelve' in your Steam Library, selecting Properties, and under Betas, select 'old_build'.
-As always, users may need to delete the persistent files in case achievements suddenly stop working.
Additional Update:
There was an issue where suddenly certain background images were not appearing correctly. The issue has been fixed just now so please update your game in Steam if you haven't done so already.